/google-sheets

Connect to Google Sheets to read, analyze and write data. Pure Ruby, zero gems — stdlib only.

Structure

scripts/
├── auth.rb          # JWT auth + sheets_request helper (required by all scripts)
├── check_setup.rb   # Check if key file exists (outputs OK or SETUP_NEEDED)
├── save_key.rb      # Save a Service Account JSON key
├── list_sheets.rb   # List tabs in a spreadsheet
├── read.rb          # Read data (entire tab or specific range)
├── write.rb         # Write to a range
└── append.rb        # Append rows at the end

Setup (check before using)

ruby ~/.claude/skills/google-sheets/scripts/check_setup.rb

If the output is OK, proceed to the Flow section.

If the output is SETUP_NEEDED, guide the user step by step. Present ONE step at a time, wait for the user to confirm before moving to the next. Use simple, non-technical language.

Step 1 — Ask the user to open this link and create a new project (or use an existing one):

Abra este link e crie um projeto no Google Cloud com o nome Hitank: https://console.cloud.google.com/projectcreate

Step 2 — After the user confirms, ask them to enable the Sheets API:

Agora abra este link e clique no botão azul "Ativar" (ou "Enable"): https://console.cloud.google.com/apis/library/sheets.googleapis.com

Step 3 — After the user confirms, guide them to create a Service Account:

Abra este link e clique em "Criar conta de serviço" (ou "Create Service Account"): https://console.cloud.google.com/iam-admin/serviceaccounts

No campo "Nome da conta de serviço", escreva: Hitank Planilha Clique em "Concluir" (ou "Done").

Step 4 — After the user confirms, guide them to download the key:

Na lista que apareceu, clique em Hitank Planilha (a conta que você acabou de criar). Vá na aba Chaves (ou "Keys"). Clique em Adicionar chave → Criar nova chave → escolha JSON → Criar. Um arquivo vai ser baixado automaticamente. Abra esse arquivo, copie TODO o conteúdo e cole aqui.

Step 5 — When the user pastes the JSON, save it:

ruby ~/.claude/skills/google-sheets/scripts/save_key.rb 'PASTED_JSON_CONTENT'

The script outputs the client_email. Tell the user:

Última etapa! Abra sua planilha no Google Sheets, clique em Compartilhar (canto superior direito), e cole este email: <client_email> Escolha a permissão Editor e clique em Enviar. Isso permite que a gente acesse a planilha.

If setup is not complete, DO NOT proceed to the Flow. Complete all steps first.

Flow

The argument $ARGUMENTS contains the Google Sheets URL.

Step 1: Extract the spreadsheet ID

From the Google Sheets URL, extract the ID (the segment between /d/ and /edit or the next /).

Step 2: List tabs

ruby ~/.claude/skills/google-sheets/scripts/list_sheets.rb SPREADSHEET_ID

Present the tabs to the user and ask which one to access (or access the first one by default).

Step 3: Read data

Entire tab (first by default):

ruby ~/.claude/skills/google-sheets/scripts/read.rb SPREADSHEET_ID

Specific range:

ruby ~/.claude/skills/google-sheets/scripts/read.rb SPREADSHEET_ID "Sheet1!A1:D50"

Output is JSON (array of arrays). Parse and present to the user in a readable format.

If the spreadsheet is large (>100 rows), read only the relevant range.

Step 4: Analyze

After reading the data, present a summary to the user:

• How many rows/columns
• Headers (columns)
• Data sample
• Ask what the user wants to know or do

Step 5: Write (with confirmation)

ALL writes require explicit user confirmation before executing.

Show exactly what will be written and where (cell, range, tab). Only execute after a "yes".

Write to a range:

ruby ~/.claude/skills/google-sheets/scripts/write.rb SPREADSHEET_ID "Sheet1!A1:B2" '[["a1","b1"],["a2","b2"]]'

Append rows at the end:

ruby ~/.claude/skills/google-sheets/scripts/append.rb SPREADSHEET_ID "Sheet1" '[["col1","col2","col3"]]'

For formulas and dates interpreted by Sheets, pass USER_ENTERED as the last argument:

ruby ~/.claude/skills/google-sheets/scripts/write.rb SPREADSHEET_ID "Sheet1!A1" '[["=SUM(B1:B10)"]]' USER_ENTERED

Notes

• Pure Ruby, zero gems — stdlib only (openssl, base64, json, net/http)
• Auth via Service Account JWT → Bearer access token (valid for 1h)
• Key file: ~/.config/gcloud/sheets-sa-key.json (outside the repo, never commit)
• All writes require user confirmation — reads are free
• If the spreadsheet is not shared with the Service Account, you'll get a 403 error
• Rate limits: Google Sheets API has a limit of 60 requests/minute per user